You need the story send the story
The answer is context clues. This is because you're using the clues from the other words (sentences/paragraphs) to answer the definition of the word.
A concrete statement can be considered as a 'solid' statement. This means that the sentence must contain hard facts to manifest the credibility of the statement. As much as possible, you give specific examples and provide evidence for this. From the choices, the answer would be D.
